[PHP] BBCode probleem

<?

    function code($f){
        $f = str_replace("&amp;", "&", $f);

        $regels = count(explode("<br>", nl2br($f)));
        $regels2 = count(explode("<br \>", nl2br($f)));
        $regels3 = count(explode("\n",  nl2br($f)));
        $f = str_replace("&gt;", ">", $f);
        $f = str_replace("&lt;", "<", $f);
        $f = str_replace("&quot;", "\"", $f);
        $f = str_replace("\"", "\\\"", $f);
        $f = str_replace("&acute;", "`", $f);
        $f = htmlspecialchars($f);

        $code = str_replace("&amp;", "&", $code);
        $return = "<div style=\"width: 550px; overflow: auto; table-style: fixed;\">Code:<br><table width=\"400\" style=\"font-family: courier new; font-size: 12px;\" border=\"1\" cellpadding=\"0\" cellspacing=\"0\"><tr><td valign=\"top\">";
        for ($i = 1; $i < ($regels + $regels2 + $regels3); $i++){
            $return .=  $i . "<br>";
        }
        $return .=  "</td><td valign=\"top\"><table cellpadding=\"0\" cellspacing=\"0\" border=\"0\"><tr><td nowrap>" .  stripslashes(nl2br($f)) . "</td></tr></table></td></tr></table></div>";
        return $return;

    }
function quote($f){
    return "<div class=\"mainquote\">Quote:<div class=\"quote\">" . $f. "</div></div>";
}
function ubb($f){
    $f = nl2br($f);
    $query = mysql_query("SELECT * FROM `" . $GLOBALS['prefix'] . "smilies`");
    while ($row = mysql_fetch_array($query)){
        $f = str_replace($row['shortcut'], "[img]'"[/img]", $f);
    }
    $f = preg_replace("/\[quote](.+?)\\[\/quote]/ise", "quote('\\1')", ($f));
    $f = preg_replace("/\[message=(.*?)\](.+?)\\[\/message]/isD", '<a href="singlepost.php?post=\\1">\\2</a>', ($f));
    $f = preg_replace("/\[img]http:\/\/(.+?)\\[\/img]/isD", '[img]"http://\\1"[/img]', ($f));
    $f = preg_replace('#(^|[\n ])(http://[^ \n\r\t<]*)#is', '\\1<a href="\\2" target="_BLANK">\\2</a>', $f);
    $f = preg_replace('#(^|[\n ])(www.[^ \n\r\t<]*)#is', '\\1<a href="http://\\2" target="_BLANK">\\2</a>', $f);

    $f = str_replace("[b]", "<b>", ($f));
    $f = str_replace("[/b]", "</b>", ($f));
    $f = str_replace("[i]", "<i>", ($f));
    $f = str_replace("[/i]", "</i>", ($f));
    $f = str_replace("[u]", "<u>", ($f));
    $f = str_replace("[/u]", "</u>", ($f));
    return $f;
}

<?
    function code($f){

        $regels = count(explode("<br>", nl2br($f)));
        $regels2 = count(explode("<br \>", nl2br($f)));
        $regels3 = count(explode("\n",  nl2br($f)));
        $f = str_replace("&quot;", "\"", $f);
        $f = str_replace("\"", "\\\"", $f);
        $f = str_replace("&acute;", "`", $f);
        $return = "<div style=\"width: 550px; overflow: auto; table-style: fixed;\">Code:<br><table width=\"550\" cellspacing=\"0\" style=\"border-right: black solid 1px;border-top: black solid 1px;border-left: black solid 1px;\"><tr><td width=\"10\" bgcolor=\"#DCD9D6\"><strong>";
        for ($i = 1; $i < ($regels + $regels2 + $regels3); $i++){
            $return .=  $i . "<br>";
        }
        $return .=  "</strong></td><td valign=\"top\" nowrap>" .  (stripslashes($f)) . "</td></tr></table></div>";
        return $return;

    }

function quote($f){
    return "<div class=\"mainquote\">Quote:<div class=\"quote\">" . $f. "</div></div>";
}
function ubb($f){

    $f = nl2br($f); 
preg_match_all('/\\[code\](.*?)\\[\/code\]/is', $f, $codematches); 
    $query = mysql_query("SELECT * FROM `" . $GLOBALS['prefix'] . "smilies`");
    while ($row = mysql_fetch_array($query)){
        $f = str_replace($row['shortcut'], "[img]'"[/img]", $f);
    }
    



    $f = preg_replace("/\[quote](.+?)\\[\/quote]/ise", "quote('\\1')", ($f));
    $f = preg_replace("/\[message=(.*?)\](.+?)\\[\/message]/isD", '<a href="singlepost.php?id=\\1#\\1">\\2</a>', ($f));
    $f = preg_replace("/\[img]http:\/\/(.+?)\\[\/img]/isD", '[img]"http://\\1"[/img]', ($f));
    $f = preg_replace('#(^|[\n ])(http://[^ \n\r\t<]*)#is', '\\1<a href="\\2" target="_BLANK">\\2</a>', $f);
    $f = preg_replace('#(^|[\n ])(www.[^ \n\r\t<]*)#is', '\\1<a href="http://\\2" target="_BLANK">\\2</a>', $f);


    $f = preg_replace('/\[b](.*?)\\[\/b]/si', '<strong>\\1</strong>', $f);
    $f = preg_replace('/\[u](.*?)\\[\/u]/si', '<u>\\1</u>', $f);
    $f = preg_replace('/\[i](.*?)\\[\/i]/si', '<em>\\1</em>', $f);
if (!empty($codematches)) 
{ 
    $j = 0; 
    $f = preg_replace('/\\[code\](.*?)\\[\/code\]/ise', code('$codematches[1][$j++]'), $f); 
} 

    return $f;
}

if (!empty($codematches)) 
{ 
    for ($j = 0; $j < count($codematches); $j++){
  
    $f = preg_replace('/\\[code\](.*?)\\[\/code\]/is', code($codematches[1][$j++]), $f); 
    }
}